This report describes how calculations of air conditioning
correction factors will account for variations in temperature,
humidity, solar load, air conditioning malfunction rates and
the fraction of vehicles with air conditioning.

This document reports on EPA's methods of estimating the resting
loss and diurnal evaporative hydrocarbon emissions from vehicles
certified to the enhanced evaporative standards (i.e., some
1996 through 1998 and all 1999 and newer vehicles).

This document describes EPA plans to compute model-year and
age specific average resting loss and diurnal emissions by weighting
together the emissions of passing and failing vehicles according
to their frequency in the in-use fleet.

This document describes the rate of decline in hot soak emissions
over a one hour time period. This information will be used in
MOBILE6 with the hot soak emissions and activity information
from the two documents M6.FLT.004 and M6.EVP.004.

This report examines the effects of "gross liquid leakers"
(see report M6.EVP.009), and then compares recent running loss
test results with the result of combining the estimated emissions
of those leaking vehicles with the MOBILE5 running loss estimates.

"Open loop" refers to vehicles which do not use electronic
feedback systems to control the delivery of fuel to the engine
cylinders. Motorcycles, older light-duty vehicles and most diesel
vehicles are open-loop.

Determination of Methane Offsets as a Function of Mileage
for Light-Duty Cars and Trucks

This document describes a methane "offset" to separate total
hydrocarbons from non-methane hydrocarbons in MOBILE6 calculations
and output. The report treats start and running emissions differently
and models an offset that changes with vehicle deterioration.

Update to the Determination of CO Basic Emission Rates, OBD
and I/M Effects for Tier 1 and Later LDVs and LDTs

This document (September 2003) updates and supercedes the
CO emission factors originally described in the document M6.EXH.009
(April 2001). The update accounts for the changes made in MOBILE6.2
to account for the effects of Low Emitting Vehicle (LEV) and
Tier 2 HC and NOx standards on CO emissions.

Update to the Accounting for the Tier 2 and Heavy-Duty 2005/2007
Requirements in MOBILE6

This document (September 2003) updates and supercedes the
CO emission factors originally described in the document M6.EXH.004
(November 2001) for light duty Tier 2 vehicles. The update accounts
for the changes made in MOBILE6.2 to account for the effects
of Tier 2 HC and NOx standards on CO emission rates.

This report describes EPA's estimates of the empirical relationship
between fuel sulfur content and HC, NMHC, CO and NOx emissions
as a function of vehicle technology and vehicle emissions for
gasoline powered vehicles.

Describes analysis of data on effects of fuel oxygenates on
CO emissions. Estimates percent benefits. Includes contractor
report on older vehicles and EPA analysis of newer cars. Benefits
will decrease as fleet shifts to new cars.

This report describes the analysis of fuel economy for heavy-duty
engines (1987-1996), and fuel density for gasoline and diesel.
And it examines the use of non-engine fuel economy improvement
devices for forecasting conversion factors in the future.

This report discusses the calculation of average engine brake-specific
fuel consumption (BSFC) for model years 1987-1996, calculates
conversion factors for all heavy-duty vehicle weight classes,
and projects conversion factors for 1997-2050.

This report describes the analysis of the new driving cycle
data and presents the resulting speed correction factors used
in MOBILE6 for the gasoline passenger car and light duty gasoline
truck classes, including the effects of off-cycle driving and
the effects of the SFTP on newer vehicles.

Development of Methodology for Estimating VMT Weighting by Facility Type

This report summarizes the results of work conducted for EPA
involving the development and application of methods to estimate
certain aspects of on-road vehicle activity (default distributions
of VMT by hour, speed and roadway type).

For MOBILE6, the existing MOBILE5 temperature correction factors
will still be used. However, they will be applied separately
to cold start, hot start, and running LA4 emissions rather than
weighted together into an overall FTP correction.